. 7. An infinitely long, straight string has a uniform linear charge density of A expressed in C/m. A sphere of radius R has its center at a point on the string. What is the electric flux through the sphere? a) =AR/2 b) =X/2TEOR c) =XR/20 =/0 e) =2XR/0 d) Consider two points A and B. An electric field points from B towards A, and is constant in magnitude, so that EB = EA. How are the electric potentials at A and B related? a) VB = VA b) VB > VA c) VB < VA d) VB < VA only if a positive charge is moved from B to A e) VB = V only if a negative charge is moved from B to A A E B